laundry/miniprogram_npm/@vant/weapp/switch/index.wxml

<wxs src="../wxs/utils.wxs" module="utils" />
<wxs src="./index.wxs" module="computed" />

<view
  class="{{ utils.bem('switch', { on: checked === activeValue, disabled }) }} custom-class"
  style="{{ computed.rootStyle({ size, checked, activeColor, inactiveColor, activeValue }) }}"
  bind:tap="onClick"
>
  <view class="van-switch__node node-class">
    <van-loading
      wx:if="{{ loading }}"
      color="{{ computed.loadingColor({ checked, activeColor, inactiveColor, activeValue }) }}"
      custom-class="van-switch__loading"
    />
  </view>
</view>